mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Use setenv_ulong(), setenv_hex() and setenv_addr() in common/ Signed-off-by: Simon Glass <sjg@chromium.org>
123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
/*
|
|
* Copyright 2008 Freescale Semiconductor, Inc.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
/*
|
|
* This file provides a shell like 'expr' function to return.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <command.h>
|
|
|
|
static ulong get_arg(char *s, int w)
|
|
{
|
|
ulong *p;
|
|
|
|
/*
|
|
* if the parameter starts with a '*' then assume
|
|
* it is a pointer to the value we want
|
|
*/
|
|
|
|
if (s[0] == '*') {
|
|
p = (ulong *)simple_strtoul(&s[1], NULL, 16);
|
|
switch (w) {
|
|
case 1: return((ulong)(*(uchar *)p));
|
|
case 2: return((ulong)(*(ushort *)p));
|
|
case 4:
|
|
default: return(*p);
|
|
}
|
|
} else {
|
|
return simple_strtoul(s, NULL, 16);
|
|
}
|
|
}
|
|
|
|
static int do_setexpr(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
ulong a, b;
|
|
ulong value;
|
|
int w;
|
|
|
|
/* Validate arguments */
|
|
if (argc != 5 && argc != 3)
|
|
return CMD_RET_USAGE;
|
|
if (argc == 5 && strlen(argv[3]) != 1)
|
|
return CMD_RET_USAGE;
|
|
|
|
w = cmd_get_data_size(argv[0], 4);
|
|
|
|
a = get_arg(argv[2], w);
|
|
|
|
if (argc == 3) {
|
|
setenv_hex(argv[1], a);
|
|
|
|
return 0;
|
|
}
|
|
|
|
b = get_arg(argv[4], w);
|
|
|
|
switch (argv[3][0]) {
|
|
case '|':
|
|
value = a | b;
|
|
break;
|
|
case '&':
|
|
value = a & b;
|
|
break;
|
|
case '+':
|
|
value = a + b;
|
|
break;
|
|
case '^':
|
|
value = a ^ b;
|
|
break;
|
|
case '-':
|
|
value = a - b;
|
|
break;
|
|
case '*':
|
|
value = a * b;
|
|
break;
|
|
case '/':
|
|
value = a / b;
|
|
break;
|
|
case '%':
|
|
value = a % b;
|
|
break;
|
|
default:
|
|
printf("invalid op\n");
|
|
return 1;
|
|
}
|
|
|
|
setenv_hex(argv[1], value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_CMD(
|
|
setexpr, 5, 0, do_setexpr,
|
|
"set environment variable as the result of eval expression",
|
|
"[.b, .w, .l] name [*]value1 <op> [*]value2\n"
|
|
" - set environment variable 'name' to the result of the evaluated\n"
|
|
" express specified by <op>. <op> can be &, |, ^, +, -, *, /, %\n"
|
|
" size argument is only meaningful if value1 and/or value2 are\n"
|
|
" memory addresses (*)\n"
|
|
"setexpr[.b, .w, .l] name *value\n"
|
|
" - load a memory address into a variable"
|
|
);
|